Publication Date:
2014-04-16
Description:
The spatial variability of carbon dioxide (CO2), methane (CH_4), and nitrous oxide (N_2O) fluxes from forest soil with high nitrogen (N) deposition was investigated at a rolling hill region in Japan. Gas fluxes were measured on July 25th and December 5th, 2008 at 100 points within a 100 × 100 m grid. Slope direction and position influenced soil characteristics and site-specific emissions were found. The CO2 flux showed no topological difference in July, but was significantly lower in December for north-slope with coniferous trees. Spatial dependency of CH_4 fluxes was stronger than that of CO2 or N_2O and showed a significantly higher uptake in hill top, and emissions in the valley indicating strong influence of water status. N_2O fluxes showed no spatial dependency and exhibited high hot spots at different topology in July and December. The high N deposition led to high N_2O fluxes and emphasized the spatial variability. ©2014 Royal Swedish Academy of Sciences
Print ISSN:
0044-7447
Electronic ISSN:
1654-7209
Topics:
Energy, Environment Protection, Nuclear Power Engineering
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